Mechanism for shaping and swaging rock-drills.



PATENTED MAILZO, 1906.

P, LIGHTBODYQ MECHANISM FOR SHAPING AND SWAGING ROCK DB ILLS.

APPLIUATIO.'N FILED JULY 2 3 SHEETS-SHEET 1.

PATBNTED MAR. 20, 1906.

No. 815,844. v P. LIGHTBODY.

MECHANISM FOR SHAPING AND SWAGING ROCK DRILLS.

APPLIOATION FILED JULY 2, 1904. I v

PATENTED MAR. 20, 1906. W. P. LIG HTBODY.

MECHANISM FOR SHAPING-AND SWAGING ROCK DRILLS.

APPLIUATIOIN FILED JULY 2, 1904.

3 SHEETSSHEET 3;

mummy z I I H3O A 25 .To all whom it may concern: I I

-. QUNITED ,sTA "i TE T, OFFICE- WILLIAM PARR LIGHTBODY, oi -so rIA NEsB Re, TRANS-VA AL.

MECHANISM FOR VSHAPYINGF AND 'swAeme ROQk- -DRILLS.

' of Lancaster, England, have invented certain new anduseful Improvements in Mechanism for Swaging or Shaping Rock-Drills, of which the following description, together with the accompanying sheets of drawings, aspecification.

Myinvention relates to improvements in mechanism for sharpening rockdrills of the class wherein the cutting edges converge, so that they form a kind of star or cross, the bar of metal out of which they are formed having three or fourribs; and my saidinvention more particularly relates to that part-of said mechanism which is for swaging or acting upon the sides of the wings or ribs of the dr l so as to bring them to their roper and desired shape, ready for being su jected to other parts of the drill-sharpening process.

In the accompanying drawings, Figure 1 is h a front elevation of my lmprovedswaging mechanism. Figs. 2 and 3. are plan and side elevation, respectively, of said .mechanism.

Fig. 4 is sectional front elevation, drawn to j Fig. 6 is a cross-sectional view on line M N of.

an enlarged scale, showing the series of swages and devices for operating same. Fig. 5 is sectional side elevation on line G H of Fig. 4.

Fig. 4. Fig. 7 is a similar view-t0 a portion of Fig. 4, but shows a .modification thereof. Figs. 8 and 9 are side elevation and plan, respectively, of one form of swage employed -1n my improved mechanism. Figs. 10, 11,

and 12 are sectional side elevation, end elevation, and plan, respectively, illustrating'anotherform of swage. as employed in making new drills, as hereinafter described. Fig. 13 is a detail drawing showing the form of rockdrill for the sharpening of which my improvements are especially applicable.

A indicates the base-plate of the machine.

Upon this base-plate I mount the'framework C,W1thl11 which are formed grooves 2 for the reception of sliding blocks-3 (four in number which are held in position by the caps 4 connected to the framework 0 by bolts 5. At the converging ends of the blocks 3 are mounted swages 6, these being fixed in osition within grooves 7, formed in said b oaks 3, by pins or cotters 8. The outer ends of the blocks 3 are provided with caps or shoes 9,

Specification of Letters Patent. I Application filed July 2, 1904. Serial No. 215,141.

' Patented "March 20, 1966.

which are held in contact with the inner surface of the ring or annular piece 10 by s rings 1 1, contained in said blocks 3 and which bear against pins 12, mounted in the framework 3C. The cams 13 are formed of flat plates embedded in the surface of ring 10, the-exposed faces of said plates forming :chords of the circle defined by the contour ofsaid ring, whereby the latter as it. is rotated by its drivingshaft 14 causes the blocks 3 to reciprocate radially to cause the swages 6 to act upon the wings15 and central art of the drill .16. The cam-ring 10 may be ormed in two parts, 10

and 10 fixed together by screws 17, and the cam parts 13 may further beformed separately and-be fixed to the part 10 by screws 18, this method rendering the severalparts easierforrenewal or repair; The inner surfaceof the cam-ring 1 0 is further formed of moving it longitudinally or axially over the caps 9 the swages 6 may be caused to operate nearer toor farther from the center of said ring 10, so as to treat drills of different sizes.

inclineshape in an axial direction, so that by feathers to permit its lon itudinal movements, and these latter may e performed by the hand-lever 20, (shown in full lines, Fig.

3,) mounted on the shaft 21 and connected to the shaft 14 through the lever 22, link 23, and

'lever 24, bowls 25 on which take between collars 26, fixed upon said shaft 14.

' The swages 6 (illustrated in detail by Figs. 8 and 9) are used when sharpening worn drills and for forming the wings 15 of the drills from octagonal bars, while in the manufacture of new drills direct from a bar 16 of steel, the end of which is flat, I employ the swages 6, (shown by Figs. 10, 11, and 12,) in which a cutter 28 is fixed therein by the set screw 29. The end'of the bar is first acted upon by the inclined parts 30 of the swages,

so as to commence the shaping of such outer end, after which the bar is fed farther for- Ward, so that the cutters 28 may cut said outer end in order to bring the cutting ed es of the drill nearer completion, said drill eing afterward treated by other devices emplo'yed in the complete drill-shzirpenin procv cess'to finish or bring said cutting e ges to theexact shape desired.

. Instead of the caps 9 above described rollers or bowls 3 1, as shown by Fig. 7, may be employed for contact with the cam-ring 10.

The devices hereinbefore described are used for operating upon drills having four wings or ribs. However, it will readily be seen that by employing three sliding blocks 3 and swages 6 or 6 and mounting them in proper relative positions I may perform the functions desired upon drills having three wings or ribs.

Having thus described the nature and object of my said invention, what I claim is 1. A machine of the character described comprising a stationary support, a plurality of radially-arranged swaging devices carried thereby, a rotary shaft, a cam-ring carried thereby and encircling said swaging devices, said ring being provided with longitudinallyinclined cam-plates, means for holding the outer ends of said swaging devices normally in contact with said ring, means for reciprocating said shaft and ring, and means for r0- tating said shaft and ring, whereby said swaging devices are operated.

2. A machine of the character described comprising a stationary support, a plurality of radially-arranged swaging devices carried thereby, a rotary shaft, a cam ring carried thereby and encircling said swaging devices, said ring being provlded with cam-plates,

means for holding the outer ends of said swaging devices normally in contact with said ring, a lever connected to said shaft, means for operating said lever, whereby said shaft and ring are reciprocated, and means for rotating said shaft and ring, whereby said swaging devices are operated.

3. A machine of the character described comprising a stationary support, a plurality of radially-arranged swaging devices carried thereby, a rotary shaft, a cam-ring carried thereby and encircling said swaging devices, said ring bein provided with cam-platos, means for 1101 ing the outer ends of said swaging devices normally in contact with said ring, a lever connected to said shaft, a rock-shaft, connections between said lever and rock-shaft, an operating-lever for said rock-shaft, and means for rotating said shaft and ring, whereby said swaging devices are operated.

In testimony whereof I have afiixed my signature in presence of two witnesses.

WILLIAM FARR LIGHTBOD Y.

Witnesses:

SAMUEL HEY, JAMES HENRY ELLISON. 

